Explosive-engine.



R. G. MITCHELL & H. M. NEER.

' EXPLOSIVE ENGINE.

I APPLICATION FILED NOV. 28, 1910. 1,076,903. Patented 0013.28, 1913.

2 SHEETS-SHEET 1.

Elwin/"toms RAYMOND '0. ngcg ELL AND: EA R 1 N EB, SBBIHGEI LQ.

UNITED TATES mwi r mm 1,076,993. 7 s ecm aqon qt Lgiftets gum. I g t t g 25;,

m w n 1w; Bomb 2 man 4- 2 422- Y '0 all whom it may concern:

Be it known that we, RAYMOND 'C. MITGI-IELL and HARRY M. NEER, citizens ofthe United States, residing at Springfield, in thevcounty of Clark and State-oi Ohio, have invented, certain new and useful 1mprovements in Ex1119Siva-E11,gimzs which the foilowlng 1s a specification, ageiempq;

being had therein to {she ascompanymg enibpdimems of pup rs -10 wwiit ken 99 Y of Fig. land arrgws; Fig. 3 is a eta l .VIfiW of 9 4; p thp' cirawin 'si v This mventiqn slams ta explosive gngines nd mo e parti ularly to v lv operating m'zcha-ni m or uch engines- The QbjBGi 0f the invgptiqn is to pg-ovide 'q a vem at gm sh tivgly movg hqth the inletvalve and exhaust valve tQ ad andirqm he aats; whi h w ll 2 ar ang i aa light cushioning spring to be empipyed an 'the valvg: stem; wh'ch 111 be very glmple in is cpnstru w d wi embqdy a m mum umbm' 1f pam- 11; is; also an objept t0 provide a valve c-gggz 1 for; the inlet or exhaust al an 0f h a cqn tiqn hat it is] adaptable either md ly aw km an be a y r q fid r th n in and wpa d, wh h will hflinflxpensive to manufacture.

A further provici an oil pump whiph will be digectig wn d? t t ng ne shaf qns w ll' h-mu th oi t th v ral h mmgs n h qc nmanyin l wi fi gm is a ap, plan vivr i a xp e sing n embodying Q131- igventign; Fig. 2 i; g transt s 11 .9 m a: Qqkip, thg

in th 111". 9 9;

ca sirg 5Q lowep pqgtlpu 91f em .v dp h 'ss i at at 6, farm 'ap Qii l egqptg ple he'bgttgm of this reafiiptgml; 11S preigpahly inclined t0 cgusin an sm wh c will p0 i-,

i t qi h n smi is 1 awns a inn wed in g. 111;.-

form a well Ext one end thereof win which a suitabl'e' oii pump oommunicatas. oil

pump COBIPI'ISES {a vertically afmngeci yiinder flit-he lower end of Which cermrgnizm'caias with the oil receptacle 6 and in whiah is mQunted a suitable pistdn 8, the upper and of which pmvided with a connecting; memher of rod 9 having a bearing strap 10 which exte dsaboiltan eccentric 11 carried by the crank shait 4; thqreby directly con- 6;,

nsting the plston 8 to' thecrank shaft and the pump to be actuated directly ii -pm t e shaft. The OPQIHtiOH of the pump forces the oil through :1 pipe 12 to a distriber .3 t rough. pipas'l, o the'semml shaft. 4

The en 'n9 is designed particularly far 4* w th a'u qmqhiles,*an w en s9 u e i? pmfe able tha ashield'l5 5 1 1 161. ep "vi he i eceptacle 6 12m the of a crank ca lg' 5 t pr en Eh? hedy i 1 in. th s rewpmc e nt i g the. rank c sigg. Tbig shigld is prgvi'de with openings 5 t9. p rm t h 911w. re ur 9 h oil re:- pm e- A su s g gs 17 Qmmi nicates i he rec p ac and ind cat s h mmmt Qi Q1 wnt ined h r in T e co struction th s v ra ylind bearings of the; crank an the Qp mt-ing m chamsm th geiszr .e fim; de pviha a fi ag minde and fis' ahwis ubs an ally he same and w wi mm mgmfi h msm a 1t W 11 b und rr stqgd' th /c th s .glescn p tlqn app 1 e.s to the ew cy inde s f h gine- 1 wk yline? s Prov at its. upp n wi kt s amhw .8 a d 19 smp mimfing msp c wfily ih appl P1 e .29 and an fi inlet q ampgp and thggzghqpgp chamber gm hich it is distributed; by

an e hau qhamb au pipe h? 1 hwg I i y ma a??? 24:- 1

26 which is screw-threaded into the upper end of the chamber wall, thus renderingthe cage as a whole readily removable. The

- valve comprises a disk-like valve member 27 which seats against the lower edge of the ring 22 and has a stem 28 extending through.

the present instance We have provided acam shaft 29 extending longitudinally to the engine between the diverging portions of the cylinders, in which these valve chambers are formed. The cam shaft is'connected with the crank shaft by means of a miter gear 30 secured to the cam shaft and meshing with a similar gear 31 on a vertical shaft 32, the lowerend of which is connected by similar gears with the crank shaft. Preferably, the ratio of these gears is two to one so that the cam shaft will make but one revolution for each two revolutions of tho crank shaft. The vah-c-actuating devices comprise cams 33 rigidly secured to the cam shaft 29 and operatively connected with the respective valves by ineans of suitable connecting members. In the present instance there are four cams, one for each cylinder, and each cam operates both the inlet valve and the exhaust valve of its cylinder. The connecting members, by means of which the cams areconnected with the valves, comprise bell crank levers 34 which a re pivotally mounted on the engine frame at One arm of each lever is arranged substantially vertically and is provided with a pin 31; which enters a groove 37 in the pe riphery of its cam. The other arm of the bell crank lever extends at an angle to the arm having the pin and is connected-to the valve stem. this connection being preferably formed by bifurcating the end of the lever arm. as indicated at 38. and passingthe samc'about the valve stem 28. The upper end of this valve stem is reduced to form a shoulder 39 against which thelower edges of the bifurcated portion of the lever arm rest. A spring40is coiled about the reduced portion of the stem above the lever arm and is confined between the latter and a collar 41 mounted on the upper end of the stem. The connecting levers for the inlet and exhaust valve are, of course, arranged on opposite sides of the cam shaft and the cam \vill actuate these levers at different times during the operationof the engine. the time being controlled by the character of the groove in the cam and the pointsat which the lovers are connected with the cam. Consequently, the operation of the cam shaft will first cause the'inlet valve to positively be moved into its open position. at the beginning of the suctionstroke of the piston, and, after a sufiicient charge of gas has been delivered to the cylinder, to be positively moved to its closed position. After the e plosion and at thelbeginning of the exhaust stroke oft-he piston the exhaust valve is A bracket- 42 is rigidly secured to one end of the engine, preferably above the fly wheel and forms a support for the magneto which is indicated at 43. The magneto is preferably operated from the cam shaft and is con nected thereto by gears 44 and 45. By mounting the magneto in this manner it is supported above the base of the engine and in a position where it will not be. affected by any accumulations of dust or oil which may form about the base of the engine;

The operation of the device will be olearl y understood from the foregoing description of the several parts thereof and it will-be apparent that we have provided a valve actuating mechanism in which each' valve actuating device positively controls both the inlet valve and the exhaust valve for its respective cylinder, and in this manner the number of valve-actuating devices neces sary' to control the valves of'the engine is reduced by half from what is necessary where each valve is controlled by a separate device. Further, these actuating devices and their connecting members are ofa very simple character, will not be easily disarranged or broken and are readily accessible for ad- .justment or repair should this be necessary;

also the valves themselves are mounted in valve cages of simple, ine.pens1ve constructionwvhich, together wit the valve,

can be readilyremoved from the valvechambersl Further, the magn ito is supported in a position where it' will be free from dust and dirt and the oil pump is directly connected with the engine shaft, thereby eliminating the/usual connecting mechanism. 5

While we have shown and described one embodiment of our invention it will be understood that this form of the mechanism is chosen only for the purpose of illustration and that the several parts thereof are capable of being constructed and arranged in different manners; and it wilt-therefore. be understood that we do not desire to be limited to the details of construction shown and described, for obvious modifications posed on opposite sides oft-he- -sha-ft" and 15 will occur to a person skilled in the art fulcrumed' on the respective cylinders, said Having thus fully described our inven-- levers being arranged to rock in a plane par-- tion, what we claim as new and desire to'., :1-l1el to said shaftonear'm of eachqlever 5 secure by Letters Patent, is having operative engagement with the cam 7 An enginecomprising a pluralityof cyl- :and the other arm of each lever being reinde1's,' ashefterranged near the upper ends i spectively connected to one of the valves. q of said and extending. longitudi- 'In testimony whereoiwe alfix our-signanally of-"engi-ne',' each cylinder having tures in presence of two witnesses. 13 an inlet port on one side of said shaft and RAYMOND G. -MITCHELL.

A an oiltlet; port on the other side thereof, 1 HARRY M. NEER. valves, tocontrol'the'respective portsQea cam Witnesses:

mounted m nd shaft adjacent to each cy1-' J. FRED An'nnnson; inder, and a pair'of bell crank'levers dis- EnwARD '8. Reno.

Gupta e! In, be obtained to: count: eachflay addressing the qommll lloncr e! ratenu A, w u hinztomnc." 

